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- 4a) Write an equation for the neutralization reaction of sodium acetate in solution upon addition of HCl.6. (i) Define pH in words. The strong acid HClag has a pH value of 1, use the following equation for a strong acid: HClaa Hog + and convert the following expression to deduce the hydrogen ion concentration: pH = -log10 [H+] Clea (ii) Use the above expression to deduce the pH of HCl (ag) given the concentration of the acid to be 4.5 mol/dm³ pH =7 (a) Describe what happens when each of the following molecules is separately dissolved in water and illustrate with an equation in each case: ethanoic acid (CH3COOH) ammonia (NH3)
- Create the flowchart of qualititative analysis of Cations in Group 2 and explain.6. (1) Define pH in words. The strong acid HCl has a pH value of 1, use the following equation for a strong acid: HClag → Hag Clog And convert the following expression to deduce the hydrogen ion concentration: pH = -log10 [H+] (ii) Use the above expression to deduce the pH of HCI (39) given the concentration of the acid to be 4.5 mol/dm³ pH = 2.36. (i) Define pH in words. The strong acid HClahas a pH value of 1, use the following equation for a strong acid: H+, + and convert the following expression to deduce the hydrogen ion concentration: pH = -log10 [H*] (ii) Use the above expression to deduce the pH of HCL (ag) given the concentration of the acid to be 4.5 mol/dm3 pH =
- Why is (CH3)3Cl considered to be a Lewis Acid?Write the balanced formula unit equation for the complete neutralization of dilute H3PO4 with CaOH)2 in aqueous solution. What is the sum of the coeffioenes? Do not forget coefficients of one) O 10 012 OH 05 0.18Calculate the pH of a dilute solution that contains a molar ratio of potassium acetate to acetic acid (pKa = 4.76) of (a) 2:1; (b) 1:3; (c) 5:1; (d) 1:1; (e) 1:10
- (8) Answer each of the following questions: (a) Ka for HNO2 is 4.6 x 10-4. What is the Kb for its conjugate base ? (b) Calculate the pH of 0.1 M of HNO2 solution using the ka above.The ionization constant of lactic acid, CH,CH(OH)CO,H, an acid found in the blood after strenuous exercise, is 1.36 x 10-4. What is the concentration of hydronium ion in the solution of 0.102 M lactic acid? CH;CH(OH)CO,H (aq) + H,O (1) → H;O• (aq) + CH;CH(OH)CO, (aq) O 0.00372 M O 0.0165 M O 0.00549 M O 0.227 MMagnesium trisilicate, Mg2Si3O8·H2O in medicine is an antacid. Explain theuse of magnesium silicate as an antacid to reduce acidity in the stomach. Give theequation of reaction. For titration of 5 ml of gastric juice, 10 ml of a 0.15 Msodium hydroxide solution were used. Does the patient need to takeMg2Si3O8·H2O (The concentration of hydrochloric acid in the stomach of a healthy person is constant and amounts to 160 mmol/L)?